Pit-cage arrester



Noir. 27, 1923 M. WILLIAMS PIT vCAGE ARRESTER Filed Nov. 20, -1922 2 Sheets-Sheet 1 W/Lz. mms

Nov. 27, 1923 1,475,668

M. WILLIAMS PIT CAGE ARRESTER Filed` Nov, ,2QI 1922 2 Sheets-Sheet 2 Patented Nov. Z7, 1923.

NlTED vSTATES FF E PATENT PIT-CAGE .AR/BESTER.

Application filed November 20, 1922.

o all w 710m, it may concern Be it known that I, MORGAN VILLIAMS, a subject of the King of Great Britain and lreland, and a resident of Ogmore Vale, near Bridgend, county' of Glamorgan, Wales, have invented a certain new and useful Improvement in Pit-Cage Arresters, of which the following is a specilication.

This invention relates to a pit-cage arrester or safety device ofthe kind consist ing of rack and pinion means feo-acting with spring-actuated means to lock the pinion with the teeth of the rack on the breaking of the winding cable, thus preventing the downward movement of the cage, the rack extending the length of the shaft and separate from the cage, the spring-actuated means being mounted on top of the cage.

In the above. construction the pinion was shrouded and provided on each side with a ratchet wheel with which, on the breaking of the winding cable, and under the combined action of a. spring and the weight of the lifting shackle or ring, engaged the wedge-shaped front end of a pivotally mounted lever, the shackle pressing on the tail end of said lever, the spring pressing on the front end thereof, preventing rotation ofthe ratchet wheels, thus locking the pinion to or with the teeth of the rack, consequently arresting the downward movement of the cage.

According to the present invention, the device, of which two are employed with each cage, comprises a shrouded pinion, rotatably mounted on the roof of the cage and provided on each shroud with a rhomboidal-shaped plate formed in one with said shroud, or rigidly aiiixed thereto, and a vertically disposed rack or toothed bar located at the side of the cage and between the usual conductors, said rack or toothed bar extending the depth of the shaft. On the roof of the cage there is slidably mounted an horizontally disposed spring-pressed bar connected by cable to the ring oi the winding rope, the arrangement being` such that in the event of the breaking of o1' the unforseen slackening of the winding cable, the horizontally disposed slidable har moves forward and engages the rhomboidal-shaped plates on the pinion, stopping the rotation .of said pinion, consequently locking the same to or with the teeth of the rack, thus preventing the downward movement of the cage.

Serial No, 602,182.

ln order that the invention may be clearly understood, reference is to be had to the followingdescription and accompanying sheets of drawings, wherein Figure'l is a plan; and,

Figure 2 a vertical sectional view'illustrative of the invention, winding cable taut.

Figures 3 and 4 are similar views, but showing the arrester in action.

Figure 5 is a view of one of the shrouded pinions.

Like letters of reference indicate corresponding parts in the several figures.

.ln carrying out the invention and referring to the drawings, al, a` are two vertically disposed racks or toothed bars, located one at each side of the cage b and extending the depth of the shaft, 1, b1 are the usual conductors, and 792 the lifting chains connected to the winding cable 63.

Rotatably mounted in brackets c on the roof of the cage 7) are the shrouded pinions 01, 01', one of which is shown separately in Figure 5, and which engage with the racks c, a, the shrouds c2 of said pinions c1 being of a depth such as to cover said racks and each provided with a rhomboidal-shaped locking plate c3.

%lidabl v mounted between horizontally disposed bars Z fiXedly secured to the roof of the cage are two locking bars e, said bars e also sliding on rods (Z1 tixedly carried by transversely disposed loa-rs (Z2 secured to the bars Z aforesaid, coiled springs Z3 encircling the rods (Z1 being interposed between each locking bar e and the inner fixed bar d2. i

Through each central spring (Z3 there eX tends a wire, cable or the like which is secured at one end to its slidable bar e whilst the other end of said wire, cable or the like 7 is passed through a hole in the rear fixed bar (Z2 to and round 'ai pulley f1 mounted on the roof ol the cage 7) and up to the shackle or link coimecting the lifting chains b2 with the winding cable The arrangement is such that, as long as the winding cable remains taut. parts are in the position shown in Figures l and 2. the bars e being` drawn hack clearl of the locking plates c3 of the pinions c1, allowing the same to freely rotate as the cage moves up and down, but when said winding cable breaks, the bars e, under the action of their springs: d3, iy outwardly into engagement.

with the locking plates es of said pinions 01 sok as shown in Figures 3 and i, arresting the rotation of said pinions, holding the same rigid, t-hus locking said pinions with the racks a, ce, .thus arresting the downward movement of the cage ZJ.

I claim l. A pit-cage arrester ot' the class described including in combination with the winding cable, a pinion provided with an angular locking plate, a slidable locking` bar arranged at one side of the pinion, springs for shifting said bar toward the pinion, and a connect-ion between said bar and the wind ing cable. operable upon the break of the winding cable to release said locking bar to permit the springs to shift it into locking engagement, with the pinion.

2. A pit-cage arrester of the class described including in combination wit-h the lifting shackle of the winding cable, a pinion provided on each side with a rhomboidal-shaped plate, ay horizontally disposed slidably mounted spning-pressed locking bar arranged at one side of the pinion, and a connection between said bar and the lifting shackle whereby upon the bra-iakingi` of the winding' cable the bar may be shifted into engagement with said rhomboidal-shaped plato.

3. A pit-cage arrester of the class described including` opposite horizon-tally disrposed guide bars mounted on the rooi of the cage, transverse bars between the guide bars, rods mounted parallel to the guide bars and slidable in the transverse bars, a locking bar carried by one end ol" said rods, springs on said rods for engaging the locking bar, a pinion having rhomboidal shaped side plates7 ay pulley supported at the central part of the cage, a @able connected with the locking bar and passing over said pulley to en gage with the lifting` shackle to thereby normally hold the locking bar against the tension of said springs and out of the path of movement of the rhomboidal-shaped plates carried by the pinion.

In testimony whereof I have YailiXed my signature hereto this 6th day of November MORGAN VILLIAMS. 

